Superheating compound.



.UNITED STATES PATENT OFFICE.

HERMAN L. HARTENS"EIN, OFOHICAGO', ILLINOIS, ASSIGNOR, BYMESNEASSIGNMENTS, TO ELEoTRo CHEMICAL & DEVELOPMENT COMPANY, OF PIERRE, SOUTHDAKQTA, A CORPORATION OF SOUTH .DAKOTA.

SUPEl RHEATIN G COMPOUND- pounds. l i

The object of the invention is to provide an superheating compound foruse in raising and maintaining the temperature of materials even dateherewlth,

whileunder treatment in the manufacture of calcium carbid.

In a copending a lication'executed of' scribed, and claimed a method ofmanufacturing calcium carbid direct fromlimeStOne or lime-bearingmaterial or ore by reheating the limestone or lime-bearing suiistance tocalcine the same, then carbonaceous material withethe mass" .1 in ahighlyheated-condition, and finally delivering or distributing theheated mass or mixture to electric or other furnaces, whereit is fusedor reduced to melted condition to form carbid.

In the most economical operation of the proc-' ess it is desirable toconserve as much as possible the heat of the mass or material undertreatment in one-ste of the rocess, so that the same, may be uti ized tot e greatest possi-ble advantage in'the next succeeding step. This-isparticularly desirable during the operation of distributing the heatedmass from the preheating or mixing furnace to the-electric or otherfurnacesthat is to. say, during the calcinin or preheating operation thematerial un er, treatment is raised'to a temperature of incandescenceand it is desirable that the-mass retain this heat while beingdistributed to the electric or other furnaces,

A the mass. It is the Special purpose of the rea 11 yielding up heatwhen a ture of the mass and enabling t so that a smaller amount ofelectric current is required to'eflect the fusing or meltingof presentinvention toprovide a superheatin com our-1d which possesses theproperty 0 heate mass, thereby raising the, tempera mass toretributed ordelivered to the electric or otherfurnaces. M 4 bearing ore orsubstances frequently contain Specification of Letters Patent.Application filed July 23, 1902. Renewed" have set' forth, de-

ash, two per cent. ever, to be limited or restricted to the exact 75 dedto the Moreover, 'limestone-- or lime- Patented May 1, 1906.

Septembei 80,1905- Serial No. 280.723.

I more or less hosphorus, and the presence of any phosp orus in thefinished product 5 5 or carbid 1s .exceedingly objectionable. ThereforeI propose to em loy a superheating compound which also rives off orexpels any phosphorus'that may be'present. In carrying out my invention,therefore, I propose to provide a superheating compound which not onlypossesses the property of readil yielding or producing heat, but whichwill a so drive off or expel any phosphorus that may be present in themass of material under treatment.

I have found that a compound of the following i ngredients and insubstantially the proportions, by weight, iven satisfactorily answersthe purpose: ea-l zium carbid, sixty per cent; black oxid of man anese,twenty .per centifbitu'minous coal, fi teen per cent. aluminium, threepercent; chlorate of pot- I do not desire, howproiportions stated,as-the'same may be vame throughout a wide range and according to thequality and character ofthe limestone or other materials employed. Ihave found that "the proportions stated, however, are 0 satisfactoryunder ordinary conditions. 7

I In making up this compound I prefer to re-' duce the various elementsto pulverized or granular condition and then'thoroughl the Sametogether, and for the carbid t e ordinary"finesj from the crushers, andwhich are unfit for other or commercial purposes, may be used. a,

In the use of this compound for superheating purposes the calcium carbidserves when '90 heated to produce a high tempertaure, while the blackoxid of manganese gives off oxyen, which promotes the burning of thecar- %id. The aluminium combines with carbon monoxid or with carbondioxid, according to 9 5 the following formulae;

is produced; but its presence is of no conseuence. The aluminium. servesto expel or five off any phosphorus that'may be present. A

purity the coke, generally in the form of Possibly some trace ofaluminium-carbid 1 v The phosphorus occurs mamly as an 1mthe oXid P 0 orthe phosphate P O 3CaO,

which would be reduced in the electric fur- I nace to the oxid asfollows:

2P2053C30+ 9C 2P205+ 6C0 30820 The aluminium acts to combine with thephosphorus and form a slag, as follows:

I do not desire to be limited or restricted'to the exact ingredientsspecified, as other equivalents may be substituted with equally goodresults. -'Neither do I desire to be limited to the use of thissuperheating compound for the manufacture of carbid, as it may be founduseful for other purposes and manufactures.

When used in the manufacturie ofoarbid, copending ap lioation,"

as explained in m above referred to, t e limestone is t heated to a highde ree and then carbonaceous c therewith'and the mixture Thesuperheating i compound is then added to .the heated mass material ismix heated to incandescence.

Having now setforth the object and nature pose set forth.

of my inventiomwhat I claim as new and use:

1. n the manufacture of calcium carbid, a superheating compoundcomprising calcium carbid, carbon, an oxygen -producing substance, and ametallic element, as and for the purpose set fOItl'l-J 1 2, Asuperheating compound of the character described, comprisin a mixture ofcal cium carbid, black oxid o manganese, bitua minous coal, aluminiumand chlorate of' potash, as and for the purpose'set forth.

,ful and of my own invention, and desire to secure b Letters Patent,,is- 4o B. A superheating compound of the chai'' acter described,comprising a mixture of the following ingredients when pulverized orgranulated and in the proportions specified: calcium carbid, black oxidof manganese, 01+ tuminous coal, aluminium, and chlorate of potash, asand for the purpose set forth;

4. In the manufacture of calcium carbid, a

superheating compound comprising calcium carbid and carbon, intermixedwith oxygen producing substances and aluminium, as and or the purposeset forth.

5. A sup'erheating compound comprising calcium ca'rbid carbon,- oxid ofmangenese and chioraterof potash, as and for the puthrwitne'ss whereof Ihave hereunto set my hand, this 14th da of July, 1902, in the presenceof the subscribing Witnesses HERMAN L, I IARTENSTEIN.

Witnesses:

E. C. S'EMPLE, "S. E. DARBY.

